645705 ÷ 45 
Our goal is to divide 645705 by 45.

Step 1:
The number 45 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 45

Advancing to step 2:
45 goes into 64 1 times with a remainder of 19.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 45 from 64 leaves us with 19.
Bring next digit (5) of the dividend behind the 19 and repeat the process: 195 / 45

Moving on to step 3:
If we divide 195 by 45, we get 4 and a remainder of 15.
The next digit of our result is 4. 
Result so far: 14.0
If we take 180 away from 195, we end up with 15.
Include the next digit (7) from the dividend after 15, then repeat: 157 / 45

Step 4:
When dividing 157 by 45, we get 3 with a remainder of 22.
Write down 3 as next digit of the result. 
Result so far: 143.0
Deduct 135 from 157 and we're left with 22.
Bring next digit (0) of the dividend behind the 22 and repeat the process: 220 / 45

Going ahead to step 5:
If we divide 220 by 45, we get 4 and a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 1434.0
Subtract 180 from 220 to get 40.
Append the next digit (5) from the dividend to 40 and continue with: 405 / 45

On to step 6:
The number 45 fits into 405 9 times, leaving a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 14349.0
Deduct 405 from 405 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
If we divide 0 by 45, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 14349.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
The number 45 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 14349.0
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 14349.0, with a leftover of 0.0.